Hello have a new to me 997.1 C4 Cab the ac compressor will not turn on has plenty of 134 the Temp Controller shows the snowflake etc get plenty of air coming out vents.

Can see compressor clutch is not engaging. I have a Durametric 3.0 that’s giving a AC Module code fault.

I will be getting a PIWIS clone in a few days to do further tests but assume the Durametric is correct.

I have since ordered a AC Module to replace but no info where it’s located